Date: Mon, 9 Apr 2007 23:45:04 +0200 From: Martin Kulas <coolaz@web.de> To: freebsd-current@freebsd.org Subject: netcat with SCTP support Message-ID: <20070409214504.GA1780@thunderbird.tld>
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Hello!
I am running -CURRENT and I am happy to have SCTP support. I wrote a patch
for netcat so I can experiment with SCTP. The patch opens a SCTP socket
in one-to-one style.=20
But there is a problem I could not solve: If I open an SCTP listening socke=
t=20
with netcat and connect to it with netcat, data transfer works correctly. =
When I
kill the client process, the server process does not react on the
SHUTDOWN-chunk sent to it: poll() does not notify the process that the
association has been closed. Using TCP poll() works correctly.
Does anyone know how to solve this problem?
Thanks in advance,
Martin
<patch>
--- netcat.c.orig Fri Mar 30 21:58:02 2007
+++ netcat.c Mon Apr 9 16:59:21 2007
@@ -44,6 +44,7 @@
#ifdef IPSEC
#include <netinet6/ipsec.h>
#endif
+#include <netinet/sctp.h>
#include <netinet/tcp.h>
#include <netinet/ip.h>
#include <arpa/telnet.h>
@@ -71,6 +72,7 @@
=20
/* Command Line Options */
int Eflag; /* Use IPsec ESP */
+int cflag; /* Use SCTP */
int dflag; /* detached, no stdin */
unsigned int iflag; /* Interval Flag */
int jflag; /* use jumbo frames if we can */
@@ -138,8 +140,11 @@
sv =3D NULL;
=20
while ((ch =3D getopt(argc, argv,
- "46e:DEdhi:jklnoP:p:rSs:tT:Uuvw:X:x:z")) !=3D -1) {
+ "c46e:DEdhi:jklnoP:p:rSs:tT:Uuvw:X:x:z")) !=3D -1) {
switch (ch) {
+ case 'c':
+ cflag =3D 1;
+ break;
case '4':
family =3D AF_INET;
break;
@@ -257,6 +262,8 @@
if (argv[0] && !argv[1] && family =3D=3D AF_UNIX) {
if (uflag)
errx(1, "cannot use -u and -U");
+ if (cflag)
+ errx(1, "cannot use -c and -U");
host =3D argv[0];
uport =3D NULL;
} else if (argv[0] && !argv[1]) {
@@ -283,13 +290,23 @@
if (family !=3D AF_UNIX) {
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family =3D family;
- hints.ai_socktype =3D uflag ? SOCK_DGRAM : SOCK_STREAM;
- hints.ai_protocol =3D uflag ? IPPROTO_UDP : IPPROTO_TCP;
+ if (cflag) {
+ hints.ai_socktype =3D SOCK_STREAM;
+ // XXX IPPROTO_SCTP not supported form getaddrinfo
+ } else {
+ hints.ai_socktype =3D uflag ? SOCK_DGRAM : SOCK_STREAM;
+ hints.ai_protocol =3D uflag ? IPPROTO_UDP : IPPROTO_TCP;
+ }
if (nflag)
hints.ai_flags |=3D AI_NUMERICHOST;
}
=20
+ if ( cflag && uflag )
+ errx(1, "cannot use -c and -u");
+
if (xflag) {
+ if (cflag)
+ errx(1, "no proxy support for SCTP mode");
if (uflag)
errx(1, "no proxy support for UDP mode");
=20
@@ -418,7 +435,7 @@
}
=20
printf("Connection to %s %s port [%s/%s] succeeded!\n",
- host, portlist[i], uflag ? "udp" : "tcp",
+ host, portlist[i], uflag ? "udp" : (cflag ? "sctp" : "tcp"),
sv ? sv->s_name : "*");
}
if (!zflag)
@@ -515,9 +532,15 @@
=20
res0 =3D res;
do {
- if ((s =3D socket(res0->ai_family, res0->ai_socktype,
- res0->ai_protocol)) < 0)
- continue;
+ if (cflag) {
+ if ((s =3D socket(res0->ai_family, res0->ai_socktype,
+ IPPROTO_SCTP)) < 0)
+ continue;
+ } else {
+ if ((s =3D socket(res0->ai_family, res0->ai_socktype,
+ res0->ai_protocol)) < 0)
+ continue;
+ }
#ifdef IPSEC
if (ipsec_policy[0] !=3D NULL)
add_ipsec_policy(s, ipsec_policy[0]);
@@ -532,7 +555,8 @@
memset(&ahints, 0, sizeof(struct addrinfo));
ahints.ai_family =3D res0->ai_family;
ahints.ai_socktype =3D uflag ? SOCK_DGRAM : SOCK_STREAM;
- ahints.ai_protocol =3D uflag ? IPPROTO_UDP : IPPROTO_TCP;
+ if (!cflag)
+ ahints.ai_protocol =3D uflag ? IPPROTO_UDP : IPPROTO_TCP;
ahints.ai_flags =3D AI_PASSIVE;
if ((error =3D getaddrinfo(sflag, pflag, &ahints, &ares)))
errx(1, "getaddrinfo: %s", gai_strerror(error));
@@ -549,7 +573,7 @@
break;
else if (vflag)
warn("connect to %s port %s (%s) failed", host, port,
- uflag ? "udp" : "tcp");
+ uflag ? "udp" : (cflag ? "sctp" : "tcp") );
=20
close(s);
s =3D -1;
@@ -587,10 +611,15 @@
=20
res0 =3D res;
do {
- if ((s =3D socket(res0->ai_family, res0->ai_socktype,
- res0->ai_protocol)) < 0)
- continue;
-
+ if (cflag) {
+ if ((s =3D socket(res0->ai_family, res0->ai_socktype,
+ IPPROTO_SCTP)) < 0)
+ continue;
+ } else {
+ if ((s =3D socket(res0->ai_family, res0->ai_socktype,
+ res0->ai_protocol)) < 0)
+ continue;
+ }
ret =3D setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
if (ret =3D=3D -1)
err(1, NULL);
</patch>
--=20
PGP Key: http://www.stud.uni-hamburg.de/~kulas/mkulas_pubkey.asc
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